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Rev | Author | Line No. | Line |
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9 | daniel-mar | 1 | |
2 | ; Aysalia DOS Launcher |
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3 | ; Launches aydos1.gam and aydos2.gam |
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14 | daniel-mar | 4 | ; Revision 2018-12-05 |
9 | daniel-mar | 5 | ; (C) 2018 Daniel Marschall, ViaThinkSoft |
6 | |||
7 | .model small |
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8 | .stack 10h |
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11 | daniel-mar | 9 | |
10 | ; ------------------------------------------------------- |
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11 | |||
9 | daniel-mar | 12 | .data |
13 | |||
14 | exename1 db "AYDOS1.GAM",0 |
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15 | exename2 db "AYDOS2.GAM",0 |
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16 | cmdargs db 0,'',0dh |
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17 | |||
18 | dummy_fcb db 36 dup(0) |
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19 | |||
20 | paramblk dw 0 ; use environment of parent |
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21 | dw cmdargs ; command line arguments |
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22 | dw 0 ; cmdargs_seg |
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23 | dw dummy_fcb ; fcb1 |
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24 | dw 0 ; fcb1_seg |
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25 | dw dummy_fcb ; fcb2 |
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26 | dw 0 ; fcb2_seg |
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27 | |||
28 | menu1 db '', 13, 10, '$' |
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29 | menu2 db '', 13, 10, '$' |
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30 | menu3 db '', 13, 10, '$' |
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31 | menu4 db '', 13, 10, '$' |
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32 | menu5 db ' Aysalia DOS',13,10,'$' |
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33 | menu6 db '', 13, 10, '$' |
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34 | menu7 db '', 13, 10, '$' |
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35 | menu8 db ' Welches Spiel soll gestartet werden?',13,10,'$' |
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36 | menu9 db '', 13, 10, '$' |
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37 | menu10 db ' Dr',81h,'cke eine der folgenden Tasten:',13,10,'$' |
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38 | menu11 db '', 13, 10, '$' |
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39 | menu12 db ' 1 Aysalia DOS I',13,10,'$' |
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40 | menu13 db ' 2 Aysalia DOS II',13,10,'$' |
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41 | menu14 db '', 13, 10, '$' |
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42 | menu15 db ' 9 Beenden',13,10,'$' |
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43 | menu16 db '', 13, 10, '$' |
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44 | menu17 db '', 13, 10, '$' |
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45 | menu18 db '', 13, 10, '$' |
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46 | |||
47 | gameover1 db '',13,10,'$' |
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48 | gameover2 db 'Spiel zu Ende!',13,10,'$' |
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49 | gameover3 db '',13,10,'$' |
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50 | |||
11 | daniel-mar | 51 | ; ------------------------------------------------------- |
52 | |||
9 | daniel-mar | 53 | .code |
54 | |||
55 | clear_vga PROC |
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56 | mov ax, 0a000h |
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57 | mov es, ax |
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58 | xor di, di |
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59 | mov ax, 0 |
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60 | mov cx, 64000 |
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61 | rep stosb |
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62 | ret |
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63 | clear_vga ENDP |
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64 | |||
11 | daniel-mar | 65 | set_screen12 PROC |
66 | mov ah, 0 ; set screen mode |
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67 | mov al, 12h ; graphic mode, 640x480 pixel, 16 colors (VGA) |
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68 | int 10h |
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69 | ret |
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70 | set_screen12 ENDP |
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71 | |||
9 | daniel-mar | 72 | setup_paramblk PROC |
73 | mov ax, cs |
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74 | mov [paramblk + 4], ax ; cmdargs_seg |
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75 | mov [paramblk + 8], ax ; fcb1_seg |
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76 | mov [paramblk + 12], ax ; fcb2_seg |
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77 | ret |
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78 | setup_paramblk ENDP |
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79 | |||
11 | daniel-mar | 80 | set_numlock_on PROC |
81 | push ds |
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82 | mov ax, 40h |
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83 | mov ds, ax ; go to BIOS Data Area ( http://stanislavs.org/helppc/bios_data_area.html ) |
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84 | mov bx, 17h ; Load Keyboard flag byte 0 |
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85 | mov al, [bx] ; read |
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86 | or al, 20h ; set bit 5 (numlock) to 1 |
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87 | mov [bx], al ; write |
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88 | pop ds |
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89 | ret |
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90 | set_numlock_on ENDP |
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9 | daniel-mar | 91 | |
11 | daniel-mar | 92 | flush_keyb_buf PROC |
93 | mov ah, 0Ch ; Flush input buffer and input |
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94 | mov al, 0 |
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9 | daniel-mar | 95 | int 21h |
11 | daniel-mar | 96 | ret |
97 | flush_keyb_buf ENDP |
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9 | daniel-mar | 98 | |
11 | daniel-mar | 99 | exit_to_dos PROC |
100 | mov ah, 4ch |
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101 | mov al, 00h |
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102 | int 21h |
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103 | ret |
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104 | exit_to_dos ENDP |
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9 | daniel-mar | 105 | |
11 | daniel-mar | 106 | sleep_5 PROC |
107 | mov ah, 86h |
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108 | mov cx, 004bh |
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109 | mov dx, 4000h |
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110 | int 15h |
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111 | ret |
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112 | sleep_5 ENDP |
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9 | daniel-mar | 113 | |
11 | daniel-mar | 114 | print_menu_screen PROC |
9 | daniel-mar | 115 | mov ah, 9 |
116 | lea dx, menu1 |
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117 | int 21h |
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118 | lea dx, menu2 |
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119 | int 21h |
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120 | lea dx, menu3 |
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121 | int 21h |
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122 | lea dx, menu4 |
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123 | int 21h |
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124 | lea dx, menu5 |
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125 | int 21h |
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126 | lea dx, menu6 |
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127 | int 21h |
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128 | lea dx, menu7 |
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129 | int 21h |
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130 | lea dx, menu8 |
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131 | int 21h |
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132 | lea dx, menu9 |
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133 | int 21h |
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134 | lea dx, menu10 |
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135 | int 21h |
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136 | lea dx, menu11 |
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137 | int 21h |
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138 | lea dx, menu12 |
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139 | int 21h |
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140 | lea dx, menu13 |
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141 | int 21h |
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142 | lea dx, menu14 |
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143 | int 21h |
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144 | lea dx, menu15 |
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145 | int 21h |
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146 | lea dx, menu16 |
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147 | int 21h |
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148 | lea dx, menu17 |
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149 | int 21h |
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150 | lea dx, menu18 |
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151 | int 21h |
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11 | daniel-mar | 152 | ret |
153 | print_menu_screen ENDP |
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154 | |||
155 | print_gameover_screen PROC |
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156 | mov ah, 9 |
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157 | lea dx, gameover1 |
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158 | int 21h |
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159 | lea dx, gameover2 |
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160 | int 21h |
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161 | lea dx, gameover3 |
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162 | int 21h |
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163 | ret |
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164 | print_gameover_screen ENDP |
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165 | |||
166 | ; ------------------------------------------------------- |
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167 | |||
168 | start: |
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169 | ; Setup data segment |
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170 | mov ax, @data ; moving base address of data to ax |
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171 | mov ds, ax ; moving contents of ax into ds |
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172 | ; data section now gets initialized |
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173 | |||
174 | ; Preserve the original screen mode |
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175 | mov ah, 0Fh ; Query screen mode |
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176 | int 10h |
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177 | push ax ; actually, we are only interested in register al (screen mode), not in ah (column count) |
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9 | daniel-mar | 178 | |
11 | daniel-mar | 179 | ; Change numlock to ON |
180 | ; DOSBox has a bug where the NumLock is not correctly set to the setting of the host system, |
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181 | ; so you have to press the NumLock key twice so that DOSBox recognizes the status. |
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182 | ; see: https://sourceforge.net/p/dosbox/bugs/71/ |
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183 | ; https://superuser.com/questions/255102/is-there-a-way-to-use-the-numeric-keypad-in-dosbox/1146986 |
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184 | ; Since the game uses number keys very often, we set NumLock to ON |
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185 | call set_numlock_on |
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186 | |||
187 | ; Reduce size of own application to give the called applications more space |
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188 | ; see https://stackoverflow.com/a/10067627 |
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189 | mov ah, 4Ah |
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14 | daniel-mar | 190 | mov bx, 100 ; 100 paragraphs a 16 bytes = 1600 bytes |
11 | daniel-mar | 191 | int 21h |
192 | |||
193 | menu: |
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194 | ; Video Mode VGA 12 |
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195 | call set_screen12 |
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196 | |||
197 | ; Flush keyboard buffer |
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198 | call flush_keyb_buf |
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199 | |||
200 | ; Print menu screen |
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201 | call print_menu_screen |
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202 | |||
9 | daniel-mar | 203 | retry: |
204 | ; Query keyboard input |
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11 | daniel-mar | 205 | mov ah, 07h ; Direct character input, without echo |
9 | daniel-mar | 206 | int 21h |
207 | cmp al, '1' |
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208 | je prog1 |
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209 | cmp al, '2' |
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210 | je prog2 |
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211 | cmp al, '9' |
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11 | daniel-mar | 212 | je exit |
9 | daniel-mar | 213 | |
214 | ; Invalid input |
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215 | jmp retry |
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216 | |||
217 | prog1: |
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218 | ; Clear screen |
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219 | call clear_vga |
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220 | |||
221 | ; Setup parameter block for the EXEC command |
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222 | call setup_paramblk |
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223 | |||
224 | ; Start game 1 |
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11 | daniel-mar | 225 | mov ah, 4Bh ; execute |
226 | mov al, 00h ; load and execute |
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9 | daniel-mar | 227 | mov bx, paramblk |
228 | lea dx, exename1 |
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229 | int 21h |
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230 | |||
11 | daniel-mar | 231 | ; Notify the player that the game has finished |
9 | daniel-mar | 232 | jmp gameover |
233 | |||
234 | prog2: |
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235 | ; Clear screen |
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236 | call clear_vga |
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237 | |||
238 | ; Setup parameter block for the EXEC command |
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239 | call setup_paramblk |
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240 | |||
241 | ; Start game 2 |
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11 | daniel-mar | 242 | mov ah, 4Bh ; execute |
243 | mov al, 00h ; load and execute |
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9 | daniel-mar | 244 | mov bx, paramblk |
245 | lea dx, exename2 |
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246 | int 21h |
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247 | |||
11 | daniel-mar | 248 | ; Notify the player that the game has finished |
9 | daniel-mar | 249 | jmp gameover |
11 | daniel-mar | 250 | |
9 | daniel-mar | 251 | gameover: |
11 | daniel-mar | 252 | ; Print gameover screen |
253 | call print_gameover_screen |
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9 | daniel-mar | 254 | |
11 | daniel-mar | 255 | ; Give the player time to read the game over message (approx 5 seconds) |
256 | call sleep_5 |
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9 | daniel-mar | 257 | |
11 | daniel-mar | 258 | ; Go back to the menu |
9 | daniel-mar | 259 | jmp menu |
260 | |||
11 | daniel-mar | 261 | exit: |
9 | daniel-mar | 262 | ; Reset video mode to DOS default |
11 | daniel-mar | 263 | pop ax ; the video mode we have preserved at program start |
264 | mov ah, 0 ; set screen mode |
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9 | daniel-mar | 265 | int 10h |
266 | |||
267 | ; Return to DOS |
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11 | daniel-mar | 268 | call exit_to_dos |
9 | daniel-mar | 269 | |
11 | daniel-mar | 270 | ; ------------------------------------------------------- |
271 | |||
9 | daniel-mar | 272 | end start |